RE: [doc] Surging Idle + Acceleration Problem = ????

[Nick Tomlinson <nickandkathryntomlinson@xxxxxxxxxxx>]

Thanks Rich.
 
Don't forget the mod of coiling a stainless steel wire and shoving it in the fuel pump pick up pipe to prevent it collapsing under high flow conditions.
 
Also do the fuel pressure tests as outlined in the owners manual.
I had some muck in the CPR.
Remove fuel pump relay (black and blue 6 pin nr fuse box)
Crank/ run engine until it stalls (to remove fuel pressure)
Remove CPR fuel lines (different bolts/ threads so you can't mix them up)
Blast through with an air line
Re-attach fuel lines, preferably using NEW copper washers.
(If you can't get new ones, heat them up till hot using a plumbers blow torch, then
drop them in oil)
 
Without looking at the car it's hard to diagnose whats wrong but you
can always try the basics first.
 
Spark Plugs, Distributor cap, Rotor Arm, HT Leads, Air filter, fuel filter, Oil change 
 
NickT

Richard <dickyh11@xxxxxxxxxxx> wrote:

Hi Alistair

This is most likely a fuel mixture problem

Nick Tomlinson's the man to give you the full low down on how it's all
supposed to work, but here's a few quickies

Check for vacuum leaks, if this has suddenly happened, are all your
hoses still connected? If the mixture screw has been twiddled, has the
bung fell out of the hole?

The reason it cures itself after about five minutes is that's about how
long it takes for the engine to warm up, and the CPR (which is nothing
more than an automatic choke) to lean off the mixture. It could be down
to the lambda system fighting a poor mixture, or possibly a dodgy 02
sensor - disconnect it and see if your problem goes away to try and
narrow down the fault.

I may get lynched for saying this, but in the end after I fixed the CPR,
I just chucked a bottle of injector cleaner in a full tank, and went for
a damn good thrash - it's been fine ever since :)

Rich H
DOC 365 VIN 1274

> -----Original Message-----
> From: Alistair McCann [mailto:pilot25dmc@xxxxxxxx]
> Sent: 03 April 2005 14:48
> To: doc-uk@xxxxxxxxxxxxxxx
> Subject: [doc] Surging Idle + Acceleration Problem = ????
> 
> 
> Hi all
> 
> I took the car out today for a quick blast and was dismayed to find
that
> after startup the car had a strange surging idle that lasted untill I
had
> driven the car for around 5 minutes, It also didnt really accelerate
that
> well and stalled on me once untill the car had warmed up. I drove for
> about half an hour, stopped for about an hour and then drove for
another
> half hour without any further problems.
> 
> So, is this a fueling problem?? The car had sat for around 10 years
with
> fuel in the tank and lines and had really corroded every part of the
fuel
> system because of this I have replaced the fuel tank along with a new
pump
> and baffle so is it just old dirty particles that have hidden in the
fuel
> lines coming loose and slightly blocking the injectors untill I blast
them
> free when I warm the car up or is it something more sinister.
> 
> Any help would be fantastic.
> 
> Alistair.
> 
> [Non-text portions of this message have been removed]
> 
> 
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